Doweling device.



E. EARLE.

DOWELING DEVICE.

APPLICATION FILED JULY 2.1912.

Patented Sept. 14, 1915.

FIG-

FIG. I

FIG- V.

INVENTOR:

EDWARD EARLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-FOURTH TOJOHN D. LOCKE, 0F PHILADELPHIA, PENNSYLVANIA.

DOWELING DEVICE.

Specification of Letters-Patent.

'PatentedSept. 14, 1915.

Application fi1ed. July 2, 1912. Serial No. 707,313.

To all whomtt may concern Be it known that I, EDWARD EARLE, ofPhiladelphia, in the-Stateof Pennsylvania, have invented a certain newand useful Improvement in Doweling Devices, whereof the following is aspecification, reference being hadto the accompanying drawing.

My invention relates to devices for guiding drills to form sockets fordowel pins in wood joinery andis particularly adapted for embodiment ina portable device.

As hereinafter described my invention includes a block having a straightedge and a plane face at right angles thereto, aseries of drill vsocketsof different diameters ex tending parallel with said face and atrespectively different distances therefrom, and, a plate having its endsparallel with said straight edge and connected with said block I byadjustable clamping means so that said plate serves to guide the work inproper relation with said drill sockets, and variably limit the depth towhich drills extend through said sockets into the work, by contact ofthe end of said plate with the drill stock.

My inventionincludes the various novel features of construction andarrangement hereinafter more definitely specified.

In the drawings; Figure I is an end view of a device convenientlyembodying my invention and showing its relation to the work. Fig. II isa front elevation of the device shown in Fig. I. Fig. III is an end viewof a modified form of my invention. Fig. IV is a front elevation of thedevice shown in Fig. III. Fig. V is an edge view of a piece of workshowing dowel sockets made therein by the use of my device.

Referring to Figs. I and Illa-The block 1 has the straight edge 2 andthe plane face 3 at right angles thereto, and, the series of drillsockets 5, 6, 7, 8 and .9, of difierent diameters, extend through saidblock at right angles to said edge 2 and parallel with said plane face 3at respectively different distances from the latter. The opposite faceof said block 1 is arranged in steps respectively local to saidsocketsand at difierent .distancesfrom said plane face, and, the lines 11 arescored or otherwise marked on said stepped surface respectively parallelwith the axes of said sockets in a plane at right angles with said planesurface and intersecting the respective axis; so that said lines 11indicate the location of the axesof saidsocketsin planesnormal to saidplane surface and facilitate the location of said sockets with referenceto marks scribed on .the work as hereinafter described. Said steppedconstruction of the block 1 permits the latter to be convenientlyemployed as a gage of thickness of the material in which the holes areto be drilled. The chip outlet channels 13v extend in said block.transversely to the axes of said sockets and open into the latter topermit the escape of chips therefrom during the drilling operation. Theplane guide plate 15 is in contact with said plane face 3 ofthe blockand projects beyond said straight edge 2 to variably limit the depth towhich drills may extend through said sockets, by contact of the end ofsaid plate with the drill stock. In order to conveniently effect thelongitudinal adjustment of saidplate withrespect to said block; saidplate isprovided with graduations representing units of length, in thedirection of the length of said sockets, and has the two slots 16engaging the ribs 17 on said block, and, said plate has the slot 18 fortheclamp screw 19 which extends through thespring washer 20 inengagement with said block.

In the form of my invention shown in Figs. III and IV the block 21 hasthe opposite end flanges 22 respectively engaging the edges of the plate23 in lieu of the ribs and slots above described. Said plates not onlyserve to limit the extent to which the drills may extend through thesockets in the blocks but also serve as guides for the work whereby'thelatter may be held parallel with the straight edges of the block and atright angles to theaxes of -the drill sockets. For instance, as shown inFig. I the work 25 is placed against the straight edge 2 of the blockand extends parallel with its plane face 3, in contact with said plate,and, during the drilling operation the .work is held rigidlyin suchpositionin a vise or with any other suitable clamping means.

The location ofthe holes in the workmay be predetermined .by scribingthe work as indicatedat 28; each mark on the work be ing successivelybrought into registry with the proper line 11, on the block, indicatingthe location of the axis of the socket in the nessof the material to bebored so that the mark scribed on the work-may be seen to register withthe selected line on the block.

Although the devices above described are thus conveniently constructedand arranged to facilitate the drilling of holes centrally with respectto standard thicknesses of material such as architectural trimmings,moldings, picture frames, etcr; said devices may, of course, be employedin drilling holes at the predetermined distance of said sockets in-theblock from the plane face thereof, regardless of the thickness of thematerial drilled. For'instance, in Fig. V the material 30 is providedwith two series of holes 31 which are successively located therein byshifting said material with respect to the smallest socket in the block.

It may be observed that the method of locating the dowel socketsindicated in Fig.

V, to Wit, in two series in staggered'relation, is advantageous not onlyin that such staggered relation affords the maximum thickness ofmaterial surrounding the dowels, but that the dowels thus located opposetheir longitudinal strength to strains tending to break themtransversely, whereas dowels arranged in a single series only opposetheir transverse strength to strains tending to break them transversely.

Although for ordinary joinery I prefer to provide blocks with drillsockets extend- 7 ing at right angles to the straight edgethereof; it isto be understood that such blocks may be provided with drill socketsextending therethrough at different angles, in accordance with myinvention. Moreover, although I find it convenient to employ plates suchas I have described, in combination with the blocks containing the drillsockets, in order to guide and hold the work with respect to saidblocks, it is to be understood that such blocks may be employedwithother means for holding them,

in connection with the work, and therefore I donot desire to limitmyself to the precise details of construction and arrangement hereinsetforth as it is obvious that various modifications may be made thereinwithout departing from the essential features of my invention as definedin the appended claims.

I claim g I e p 1. In a doweling device, the combination I with a blockhaving a straight edge, a plane tances from said plane face, saidstepped face having lines respectively parallel with the axes of saidsockets in a plane at right angles with said plane face, and, chipoutlet channels extending in said block trans versely to the axes ofsaid sockets and opening into the latter; of a plane guide plate incontact with said plane face and projecting beyond said straight edge ofsaid block at the ends of said sockets, said plate having three slotsparallel with said sockets; said plate having graduations representingunits of length in the direction of the-length of said sockets; two ribson said block fitted to slide in two of said slots; a clamp screw onsaid block fitted throughthe other of said slots; and, a spring washerbetween said plate and the head of said screw; whereby said plate may beadjusted longitudinally on said block at right angles with respect tothe straight edge thereof to limit the depth to which drills may extendthrough said sockets, by contact of the end of saidplate with the drillstock.

2. In a doweling device, the combination with a block having a straightedge, a plane face at right angles thereto, and a series of drillsockets of'difl'erent diameters parallel with said face and atrespectively difierent distances therefrom, the opposite face of saidblock being arranged in steps respec-e block at the ends'of saidsockets; said plate.

having three slots parallel with said sockets; graduations representingunits of length on said plate in the direction of the length of saidsockets; tworibs on said block fitted to slide in two of said slots; aclamp screw on said block fitted through the other of said slots; and, awasher between said plate and the head of said screw; whereby said platemay be adjusted longitudinally on said block at right angles withrespect to the straight edge thereof to limit the depth to which drillsmay extend through said sockets, by contact of the endof said plate withthe drill stock.

3. In a doweling device,the combination with a block having a straightedge and a plane face at right angles thereto, a series of drill socketsof different diameters parallel with said face and at respectivelydifferent distances therefrom, and, the opposite face of said blockhaving lines respectively parallel with the axes of said sockets in aplane at right angles with said plane face; of a plane guide plate incontact with said plane face and projecting beyond said straight edgeofsaid block; said plate having graduations representing units of lengthin the direction of the length of said sockets; means slidablyconnecting said block and plate; and, clamping means; whereby said platemay be adjusted longitudinally on said block at right angles withrespect to the straight edge thereof to limit the depth to which drillsmay extend through said sockets.

4. In a doweling device, the combination with a block having a straightedge, a plane face at right angles thereto, and a seriesof drill socketsof difi'erent diameters parallel with said face, and, the opposite faceof said block having lines respectively parallel with the axes of saidsockets in a plane at right angles with said plane face; of a planeguide plate in contact with said plane face and projecting beyond saidstraight edge of said block; said plate having graduations representingunits of length in the direction of the length of said sockets; meansslidably connecting said block and plate; and, clamping means; wherebysaid plate may be adjusted longitudinally on said block at right angleswith respect to the straight edge thereof to limit the depth to whichdrills may extend through said sockets.

5. In a doweling device, the combination with a block having a straightedge, a plane face at right angles thereto, and a series of drillsockets of different diameters parallel with said face, and, theopposite face of said block having lines respectively parallel with theaxes of said sockets in a plane at right angles with said plane face; ofa plane guide platein contact with said plane face and projecting beyondsaid straight edge of said block; means slidably connecting said blockand plate; and, clamping means; whereby said plate may be adjustedlongitudinally on said block at right angles with respect to thestraight edge thereof to limit the depth to which drills may extendthrough said sockets.

6. In a doweling device, the combination with a block having a straightedge, a plane face at right angles thereto, and a drill socket parallelwith said face, and the opposite face having a line parallel with theaxis of said socket in a plane at right angles with said plane face; ofa plane guide plate in contact with said plane face and projectingbeyond said straight edge of said block; and, clamping means; wherebysaid plate may be adjusted longitudinally on said block at right angleswith respect to the straight edge thereof to gage the depth to whichdrills may extend through said socket.

7. In a doweling device, the combination with a block having a straightedge, a plane face at right angles thereto, and a drill socket parallelwith said face; of a plane guide plate in contact with said plane faceand projecting beyond'said straight edge of said block; and, clampingmeans; whereby said plate may be adjusted longitudinally on said blockat right angles with respect to the straight edge thereof to gage thedepth to which drills may extend through said socket.

8. In a doweling device, a block having a straight edge, a plane face atright angles thereto, and a series of drill sockets of differentdiameters parallel with said face and at respectively differentdistances therefrom; the opposite face of said block being arranged insteps respectively local to said sockets, at different distances fromsaid plane face, said stepped surface having lines respectively parallelwith the axes of said sockets in a plane at right angles with said planeface, and, chip outlet channels extending in said block transversely tothe axes of said sockets and opening into the latter.

In testimony whereof, I have hereunto signed my name at Philadelphia,Pennsylvania, this first day of July, 1912.

I EDWARD EARLE.

Witnesses:

ARTHUR E. PAIGE, JOHN Locnn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

